There are several tags that are associated with the background of a word:
But for historical-change, both the definition page and the tagged questions don't indicate to me that it merits distinction from either etymology nor history. I therefore recommend historical-change be merged with history, since it is the closer of the two.
Does anyone see a use for keeping them separate? If so, clarification of the distinction(s) between them should be added to their respective info pages (linked above in bullets).